| PlayListManagerを変更 activity_main.xmlの変更 | 
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| app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java | 
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| app/src/main/java/org/ntlab/amaryllis/client/voiceservice/TestVoiceService.java | 
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| app/src/main/res/layout/activity_main.xml | 
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